#!/bin/bash

# Usage: $0 <source-dir> [<ref>]
# Example refs:
#  master
#  HEAD
#  mainstream/master
# Default ref: HEAD

[ "$DEBUG" = "1" ] && set -x

set -o pipefail

if [ "$NO_CHECK" == "1" ]; then
	exit 0
fi

if [ -n "$KEYRING_DIR_GIT" ]; then
    export GNUPGHOME="$(readlink -m "$KEYRING_DIR_GIT")"
    if [ ! -d "$GNUPGHOME" ]; then
        mkdir -p "$GNUPGHOME"
        chmod 700 "$GNUPGHOME"
        gpg --import qubes-developers-keys.asc
        # Trust Qubes Master Signing Key
        echo '427F11FD0FAA4B080123F01CDDFA1A3E36879494:6:' | gpg --import-ownertrust
    fi
    if [ qubes-developers-keys.asc -nt "$GNUPGHOME/pubring.gpg" ]; then
        gpg --import qubes-developers-keys.asc
        touch "$GNUPGHOME/pubring.gpg"
    fi
fi


pushd "$1" > /dev/null || exit 2

if [ -n "$2" ]; then
	REF="$2"
else
	REF="HEAD"
fi

verify_tag() {
	git verify-tag --raw "$1" 2>&1 | grep -q '^\[GNUPG:\] TRUST_\(FULLY\|ULTIMATE\)'
}

VALID_TAG_FOUND=0
for tag in $(git tag --points-at="$REF"); do
	if verify_tag "$tag"; then
		VALID_TAG_FOUND=1
	else
		if [ "0$VERBOSE" -ge 1 ]; then
			echo "---> One of signed tag cannot be verified:"
			git tag -v "$tag"
		fi
	fi
done

if [ "$VALID_TAG_FOUND" -eq 0 ]; then
	echo "No valid signed tag found!"
	if [ "0$VERBOSE" -eq 0 ]; then
		if [ -n "$(git describe "$REF")" ]; then
			echo "---> One of invalid tag:"
			git tag -v $(git describe "$REF")
		fi
	fi
	exit 1
fi

exit 0
